Well i downloaded a cracked version of the game and put it on a usb and gave it to some of my friends. 1 of my friends actually purchased the cd, and i can connect to him fine. 1 of my friends who i gave my version to on a usb can connect to me fine, infact everyone can connect to him and he can connect to everyone perfectly. However a couple of my other friends who have my version from the usb cant connect to me and i cant connect to them. This is the problem.